Table 1

Total number of patients and exacerbation rate over time (mean rates for each period given, weeks refer to ISO weeks)

Exacerbation rate (number of episodes/person-year)
mean (95% CI)
PeriodNumber of patients in cohortResolved within primary care onlyRequired hospital visitOverall
2016 (weeks 1–12)100 1650.82 (0.76 to 0.87)0.11 (0.10 to 0.11)0.92 (0.87 to 0.98)
2016 (weeks 13–32)99 8130.52 (0.49 to 0.55)0.10 (0.09 to 0.10)0.61 (0.58 to 0.64)
2017 (weeks 1–12)98 2640.71 (0.62 to 0.80)0.13 (0.12 to 0.14)0.84 (0.75 to 0.93)
2017 (weeks 13–32)97 6890.46 (0.43 to 0.48)0.10 (0.09 to 0.11)0.56 (0.53 to 0.58)
2018 (weeks 1–12)96 0120.73 (0.64 to 0.82)0.15 (0.13 to 0.16)0.88 (0.79 to 0.97)
2018 (weeks 13–32)95 4100.43 (0.40 to 0.45)0.13 (0.12 to 0.13)0.55 (0.53 to 0.57)
2019 (weeks 1–12)91 4390.62 (0.55 to 0.68)0.14 (0.13 to 0.15)0.75 (0.68 to 0.82)
2019 (weeks 13–32)88 9760.41 (0.38 to 0.44)0.10 (0.10 to 0.11)0.51 (0.48 to 0.54)
2020 (weeks 1–12)77 2580.63 (0.59 to 0.67)0.16 (0.14 to 0.17)0.78 (0.74 to 0.83)
2020 (weeks 13–32)67 9950.23 (0.20 to 0.25)0.10 (0.09 to 0.11)0.33 (0.30 to 0.35)
  • Total number of exacerbation episodes: 278 996; exacerbation episodes managed exclusively by a general practitioner: 229 058 (82.1%); exacerbation episodes requiring hospital visit: 49 938 (17.9%).